package com.komeri.komeriapl;
import java.util.Hashtable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;

/**
 * コーデックスレッド管理
 * @author Liu Mingjia
 * */
final class DecodeHandler extends Handler {

  private static final String TAG = DecodeHandler.class.getSimpleName();

  private final BaseCaptureActivity activity;
  /**
   * 多種JANコード解析可能
   * */
  private final MultiFormatReader multiFormatReader;

  DecodeHandler(BaseCaptureActivity activity, Hashtable<DecodeHintType, Object> hints) {
	  
    multiFormatReader = new MultiFormatReader();
    
    multiFormatReader.setHints(hints);
    
    this.activity = activity;
  }

  @Override
  public void handleMessage(Message message) {
	  
      switch (message.what) {
      
          case R.id.decode:
        	  
        	  //PreviewCallback.onPreviewFrame(byte[] data, Camera camera)-->
        	  decode((byte[]) message.obj, message.arg1, message.arg2);
        	  break;
          case R.id.quit:
        	  
        	  Looper.myLooper().quit();
        	  break;
    }
  }

  /**
   * Decode the data within the viewfinder rectangle, and time how long it took. For efficiency,
   * reuse the same reader objects from one decode to the next.
   *
   * @param data   The YUV preview frame.
   * @param width  The width of the preview frame.
   * @param height The height of the preview frame.
   */
  private void decode(byte[] data, int width, int height) {
	
	//スタート時間
    long start = System.currentTimeMillis();
    
    Result rawResult = null;
    
    //modify here
    byte[] rotatedData = new byte[data.length];
    
    for (int y = 0; y < height; y++) {
    	
        for (int x = 0; x < width; x++){
        	
            rotatedData[x * height + height - y - 1] = data[x + y * width];
        }
    }
    
    int tmp = width; 
    
    width = height;
    
    height = tmp;
    
    PlanarYUVLuminanceSource source = CameraManager.get()
            .buildLuminanceSource(rotatedData, width, height);
    
    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
    
    try {
    	
      rawResult = multiFormatReader.decodeWithState(bitmap);
      
    } catch (ReaderException re) {
      // continue
    } finally {
    	
      multiFormatReader.reset();
    }

    if (rawResult != null) {
    	
    	//終わる時間
        long end = System.currentTimeMillis();
      
        Log.d(TAG, "Found barcode (" + (end - start) + " ms):\n" + rawResult.toString());
      
        Message message = Message.obtain(activity.getHandler(), R.id.decode_succeeded, rawResult);
      
        Bundle bundle = new Bundle();
      
        bundle.putParcelable(DecodeThread.BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());
      
        message.setData(bundle);
      
        message.sendToTarget();
    } else {
    	
      Message message = Message.obtain(activity.getHandler(), R.id.decode_failed);
      
      message.sendToTarget();
    }
  }

}
